Data/hora: 22/06/2024 10:39:30

Biblioteca(s): 	Embrapa Semiárido.	
Data corrente: 	11/10/2022	
Data da última atualização: 	11/10/2022	
Autoria: 	NASCIMENTO, F. A.; DUARTE, H. da S. S.; SOUZA, F. de F.; ISHIKAWA, F. H.; CAPUCHO, A. S.	
Afiliação: 	FRANCINETE ALVES NASCIMENTO, UNIVASF; HENRIQUE DA SILVA SILVEIRA DUARTE, UFPR; FLAVIO DE FRANCA SOUZA, CPATSA; FRANCINE HIROMI ISHIKAWA, UNIVASF; ALEXANDRE SANDRI CAPUCHO, UNIVASF.	
Título: 	Development and validation of a standard area diagram set to assess powdery mildew severity on watermelon leaves.	
Ano de publicação: 	2020	
Fonte/Imprenta: 	Ciência Rural, v. 50, n. 10, e20200281, 2020.	
DOI: 	http://doi.org/10.1590/0103-8478cr20200281	
Idioma: 	Inglês	
Conteúdo: 	The development and validation of a standard area diagram set (SADs) was proposed in this study to assess the severity of powdery mildew (Podosphaera xanthii) in watermelon (Citrullus lanatus) leaves. The SADs proposed has twelve levels of severity, varying from 0.07 to 100%. The SADs were validated by 16 raters who had no previous experience in evaluating plant disease severity. Initially, the estimation of severity was performed without the use of the SADs in leaves with different levels of severity. In a second moment, the same raters estimated the disease severity using the SADs proposed. By Lin?s concordance correlation analysis, there was an improvement in precision (coefficient of correlation, r = 0.878 and r = 0.959, without and with SADs, respectively) and accuracy (bias correction factor, Cb = 0.830 and 0.982, without and with SADs, respectively) using SADs when compared to the non-use of SADs. The agreement (Lin?s concordance correlation coefficient, &#961;c = 0.734 and 0.952 without and with SADs, espectively) also improved using SADs. Severity estimates inter-rater were more reliable when using SADs (coefficient of determination, R2 = 0.681 without and R2 = 0.864 with SADs; Intra-class correlation coefficient, &#961; = 0.759 and &#961; = 0.928, without and with SADs, respectively). Therefore, SADs improved precision, accuracy and reliability of powdery mildew severity on watermelon leaves.	
Palavras-Chave: 	Avaliação de doenças; Podosphaera xanthii.	
Thesagro: 	Citrullus Lanatus; Doença; Melancia; Oídio.	
Thesaurus Nal: 	Disease severity; Watermelons.	
Categoria do assunto: 	H Saúde e Patologia	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1147289/1/Development-and-validation-of-a-standard-area-diagram-set-to-assess-powdery-mildew-2020.pdf	
Registro original: 	Embrapa Semiárido (CPATSA)	
Exemplares: 	CPATSA - (60123-1) - UPC - AP - DD -  -  -  - DIS